from django.contrib.auth.backends import ModelBackend
import re
from users.models import User


def jwt_response_payload_handler(token, user=None, request=None):
    """
    自定义jwt认证成功返回数据
    """
    return {
        'token': token,
        'user_id': user.id,
        'username': user.username
    }


def get_user_by_account(account):

    # 判断登陆的方式是用户名还是手机号
    try:
        if re.match(r'1[3-9]\d{9}',account):
            user = User.objects.get(mobile=account)
        else:
            user = User.objects.get(username=account)
    except User.DoesNotExist:
        return None
    else:
        return user

# 增加多种登录方式--手机号登陆
class UsernameMobileAuthBackend(ModelBackend):
    def authenticate(self, request, username=None, password=None, **kwargs):
        user = get_user_by_account(username)

        # 如果用户存在就校验密码
        if user is not None and user.check_password(password):

            return user